piers, decks, pipes, cisterns, shotcrete, walls
Resource Stewardship in Supply Chain: industrial by-product in mix
Safety & Stability: hazardous waste management
The use of SCMs played an important role for the canister storage facility at the Hanford Site nuclear facility. The CSB is a large, 42,000 square foot facility in Hanford’s 200 East Area which stores about 2300 tons of spent nuclear fuel packaged in approximately 400 Multi-Canister Overpacks (MCO’s). The MCO’s are stored in 220 carbon steel tubes within a below grade concrete vault. The MCO’s will be safely stored in the tubes until permanent placement in a National Repository.
Resource Stewardship in Supply Chain: repair and restoration prevents waste, extends service life
Financial Stewardship: repair strategy permitted continued use of facility during construction
Aesthetics: restoration of deteriorating structures has positive effect on whole community
This 5200 ft2 (483 m2) parking deck (Fig. 1) was nearing the end of its service life, and was characterized by widespread concrete deterioration and severe corrosion of reinforcing and prestressing steel. As an alternative to demolition and reconstruction, the owner was able to repair the structure, reducing environmental impact while providing significant initial cost savings, life-cycle cost savings, and schedule savings.
Resource Stewardship in Use: durable in stressful conditions
Safety and Stability: wheel-chair accessible dock
Financial Stewardship: rapid construction
When a wooden floating dock in the Port of San Diego, San Diego, CA, had deteriorated to the point of having to be torn down, the owners chose to replace it with a floating dock assembled from precast concrete modules, the durability offered by the precast dock was a key consideration, and the modular design allowed a few standard-sized sections to be used in the creation of a variety of configurations.
Resource Stewardship in Use: service life extended, carbon reduction
Safety and Stability: critical infrastructure reconnected
Financial Stewardship: savings over replacement
Aesthetics: graceful structure over scenic canyon
Through the use of concrete repair procedures recommended by the International Concrete Repair Institute (ICRI) (chloride extraction and galvanic protection), a 50-year service life extension to this 75-year-old structure was designed and implemented. Designed and built in the 1930s as a Depression-era work project, the Rainbow Bridge is a critical transportation link in the Cascade Mountains north of Boise, ID. Completion of this project kept 1809 yd3 (1383 m3) of concrete in service.
Resource Stewardship in Use: extensive stormwater features – green roof and cistern
Resource Stewardship in Supply Chain: slag cement replaced portion of cement, local precast producer, recycled pavers
Aesthetics: green roof embellishes attractive design, reduced sprawl by denser site use
Awards and certifications
International Parking Institute Award of Excellence
Precast/Prestressed Concrete Institute Best Parking Structure
Resource Stewardship in Supply Chain: extreme recycling tested
Safety and Stability: mass concrete for x-ray testing containment
American Engineering Testing Inc. (St. Paul, MN) used the design and construction of a new X-ray vault to reduce a concrete mixture’s carbon footprint and the potential for a reduction of virgin material. The vault is entirely concrete, with a plan section of 30 x 20 ft (9.1 x 6.1 m), 12 ft high (3.7 m), and 3 ft (1 m) thick walls. The target strength was 4000 psi (27.6 MPa) at 56 days.
Financial Stewardship: low long term maintenance for taxpayer
Resource Stewardship in Use: stormwater management
Safety & Stability: public open space which promotes international understanding
When the City of Leawood, Kansas, implemented new regulations requiring developers to address stormwater runoff for the health of the community, local officials knew that their own construction practices would reflect the expected and required policies in the community.
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